Jig



V. E. WALTERS May 11 1926.

JIG

Filed July 16. 1921 atto: umg

Patented May l1, 1926@ Unirse s'rarss VERNON E. WALTERS, OF DETROIT, MICHIGAN,KASSIGNOR TO GENERAL MOTORS COR- PORATION, OF DETROIT, MICHIGAN, A CORPORATION 0F DELAWARE.

JIG.

Application filed July 16, 1921. SerialrNo. 485,322.

The present invention'has referencel to jigs and more particularly to the latch and operating handle for the movable member' Jthereof.

In quantity production, it is'necessary in each operation that the operator perform his work with as few movements as possible. The elimination of a single extra movement by an o-perator in operating a machine thatl turns out thousands of articles every day will materially speed up the production 0f that article.

In jigs employing latches for holding the bushing plate in operative position as usually constructed, it is necessary for the operator to perform two movements in raising the bushing plate to remove the worl-one to release the latch and one to raise the plate. One of the objects of this invention is the provision of al device whereby one of these movements may beI eliminated. In other words, one of the objects of this invention is the provision of a combined latch and operating means whereby the latch may be released and the movable member operated with a single movement of the operating handle.

Another object of the invention is the provision of an improved arrangement of the means for automatically operating the latch. @ther and further objects and advantages of the invention will appear as the description proceeds.

On the drawing:

'Figure 1 is a side elevation of the device with parts in sect-ion and parts broken away;

Figure 2 is a top plan view thereof, and

Figure 3 is a perspective view' of a detail thereof.

On the drawing, the reference numeral 5 indicates a base plate which is provided with supports 6 and 7 which may be of any suit? able construction and which are shown on the drawing as being integral with the plate 5. The base plate 5 is provided at the ends thereof with upwardly extending "projections S and 9.

Suitable means are provided for holding the work while it is being operated upon. In the forni of the device shown on the draw ings, the work or article is held in position to be operated upon by means of a locating block without the aid of clamping 1nechanism. It is understood, however, that clamps or other `securing means may be enr ployed if required, or desirable. The locat ing block 10 for supportingthe work to be operated uponis secured to the upper side of the plate 5 between the uprights 8 and 9 by means of suitable fastening means such as the pins or screws 11 and 1Q. The locating block is provided with an aperture i3 in which is adapted to be removably mounted the reduced end of a positioning pin li. The positioning pin 14 is provided with a collar 15 which engages about the edge of the aperture 13 and limits the downward movement of said pin. The pin is provided with an upwardly extending portion 16 which is adapted to engage in a corresponding opening 17 in the work or article 1S that is to be operated u-pon.

The locating block 10 may be of any suitable form and is so made that it will locate and hold the article in proper position to be operated upon. The one shown is adapted to be used in connection with the special form of article 18 shown in Fig. 1. rllhis article has al plain horizontal surface 19 and a plane vertical surface 2O which are adapted to engage the corresponding faces on one of the projections 2l on the block 10. It will thus be seen that the work or article 18 is held in position to be operated upon 'by the projections 21 and the positioning pin lll.

y The upright S is provided at its upper end with the reduced portion 22 to which is pivoted the bifurcated end of a bushing plate 23. The free end of the bushing plate is provided with a slot @el in which is pivotally mounted the latch 25. The latch 25 has a depending portion 26 which is provided with a. lip 27 that is adapted to engage a keeper 28 removably secured in the upright 9. 'lhe lip 2T of the latch 2G is provided with a beveled surface 29 which is adapted to engage the corresponding inclined surface 30 on the keeper 28 to automatically operate the latch when the bushing plate is moved to lowered position. The latch 25 is also provided with a projection 3l which extends laterally over a recess 3i. in the upper surface of the bushing plate 23.

Resilient means is provided for engaging the projection 31 to operate the latch in one direction. is shown on the drawing, this the surlee may be in, the ferm` 0f buehil 's 35 Wllell are removably mounted in eliitab 'e holes in the bushing plate 23.

Rieelly @swelled/te the. latch 2 5 and; ex.- t'elldirlg forwardly *elrerefrem` is a handle. 36' for operating the latch andk for elevating the bushing plate 23.

In the'operation of the device, the Work 0r article 1.8 te be. Operated. 1131130.11. is placed; in position onV the locating bloc (1Q with the in' 14. enefaerine` the recess 16'.` On` loweringy 1 a 2: I b

the bushing plate the latch 25 will auto; matically engage the keeper 2,8, AAfter the operation has been performed on thev artiele 18, that is, efrer. the recesses 37; have been bored or drilled therein,I as shown inl Fig. l, the latch 25 may be released the plate 23 elevated in one movement of the handle 36 by the operator. ,se

In Other Werde, when the operation is' complete, it is only necessary for the operator to perform a` single. movement ofthe handle 36 in order to release. the latch and elevare the bushing para afar which at' Work or article 18 may be removed and ane-i other placed; in position on` the block 1,0. It is thought from the foregoing taken in,

connection with the ac ompany'ing drawings;

that the construction and operation of my device Will be apparent to those skilied in the art; and that various changesy in size, shape, and proportion and details Of, construction may be made Without departing4 from the spirit and scope of the appended claims.

What I claim is:

1. A Work-holding device comprising two members, one of Which is provided with lQOl guiding vmeans, said members being hingedlyY conneeted on one side of the tool guiding means, and means for retaining said members in Work-holding relation including a keeper on one member, a latch pivoted to the other member, spring means acting upon said latch and operative to force the latch into engagementv With the keeper, and a handle for said latch wherebythe latch may be disengagedin opposition to the action of' said spring means and said-members may be Separated'- 2N. Ina jig of the class described, a. stationary member, a tool guiding member hinged thereto, a keeper on said stationary member, a lateh yon said tool guiding member having a depending portion for engaging said keeper and a projection extending along said movable member, a spring seated in said movable member andv provided with a movable housing for protecting said spring and for engaging said projection to retain said latch in engagement with said keeper, and a, handle for operating said latch and for moving said movable member, substantially as Shown, and described.

3. In a jig of the class described', a stationary member, a tool guiding member hinged thereto and provided with a recess, a keeper, a latch pivotally connected to said tool'` guidingA member for engaging said keeper, said latch having a projection eX- tending across said recess, a spring seated Within said recess, a housing for the outer end', of said spring slidably mounted in said recess, andy engaging said: projection, substantially as shown and described.

In testimony whereof I affix my signature.

VERNON E. WALTERS. 

